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  • The effects of stand density on the growth and microclimate of young Douglas-fir stands

    Creator:
    Woodruff, David R.
    Abstract:
    My objectives were to investigate the correlation of height and diameter growth in young Douglas-fir (Pseudotsuga menziesii) plantations with stand density, and to determine the effects of stand density on the canopy boundary layer conductance (g[subscript]ac) and microclimate characteristics of young Douglas-fir plantations. I measured annual height (h) and diameter...
    Resource Type:
    Masters Thesis
    Full Text:
    Washington. Each site consisted of test plantations of eight- and twelve-year-old Douglas-fir in initial

  • Height-related trends in structure and function of Douglas-fir foliage

    Creator:
    Woodruff, David R.
    Abstract:
    This dissertation investigated the impacts of tree height upon a range of physiological and structural characteristics of Douglas-fir foliage; relationships between structural and functional trends with height; and compensatory mechanisms that mitigate height-related growth constraints. Height-related trends in foliar physiological and anatomical characteristics were examined both within trees as well...
    Resource Type:
    Dissertation
    Full Text:
    presented on July 16, 2008. Title: Height-Related Trends in Structure and Function of Douglas-fir Foliage

  • Evaluating the effectiveness of commonly used herbaceous weed control regimes in a Pacific Northwest conifer plantation

    Creator:
    Dinger, Eric
    Abstract:
    Early in the establishment of Pacific Northwest conifer plantations, herbaceous weeds often decrease seedling growth through competition for soil moisture during the dry summer months. Critical period studies have reported that reductions in competitive weed cover are necessary during the initial years of establishment to avoid reductions in seedling growth....
    Resource Type:
    Masters Thesis
    Full Text:
    ). 2007. Washington state climate data [accessed 30 January

  • Interference dynamics in mixed red alder/Douglas-fir forests

    Creator:
    D'Amato, Anthony W.
    Abstract:
    This study characterized the nature and dynamics of interference in mixed red alder (Alnus rubra Bong.)/Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) stands in the Pacific Northwest, USA. Long-term spatial and tree measurements from the Cascade Head (CH) and H.J. Andrews (HJA) Experimental Forests in western Oregon and Delezene Creek (DC), Washington...
    Resource Type:
    Masters Thesis
    Full Text:
    in Mixed Red Alder/Douglas-fir Forests Abstract approved: Signature redacted for privacy